Automobile transmission handling jack



June 30, 1953 v. L. HAMLIN AUTOMOBILE TRANSMISSION HANDLNG JACK Filed Jan. 15, 1949 A n nventor l//Nro/v' #AML/N Gttomeg Patented June 30, 1953 l i 12,643,779" AUTOMOBILE TRANSMISSION, HANDLING f JACK Vinton L. Hamlin, Sherman oaks, Calif., assignor to The'Cleveland Pneumatic Tool Company,

Cleveland, Ohio Application January 15, 1949, serial No. 71,165

This invention relates to a jackv device for handling automobile transmissions, although the same is as readily adapted'to handle'other simijlarly heavy units under like conditions.

Automobile transmissions can be removed for 'repair only from beneath. Transmissions, and

particularly autolnaticY transmissions, are quite heavy. The handling. of the same, when being removed and installed, subject the mechanic to bodily strains that frequently result in irreparable'(ila1rl-agek.y f f An object of the'present invention, therefore, is to P IOvide a novel jack device that is adapted to Ybe moved to a position beneath a transmission,

be adjusted to receive the same, be lowered to clear the chassis from which the transmission is removed, and to be `removed from beneath said chassis-all Without subjecting the mechanic to undue bodily stmains.Y The present device, of course, has equal facility for replacing. a transmission after removal.

Ano-ther object of the invention is tol provide a jack device of ,the character indicated -that is formed to have a stable baseV the elements of which are widespread to allow a working position betweenthem during removal'and replacementof a transmission.

A further Objectis to .providea jack device, as indicated, with a" separately adjustable transmission-supporting cradle whereby the same can be adjusted to a transmission and then adjusted to properly balance the same while the device is being moved.

The invention also has for its objects to provide such means that are positive in operation, convenient in use, easily installed in a working position and easily disconnected therefrom, economical of manufacture, relatively simple, and of general superiority and serviceability.

The invention also comprises novel details of construction and novel combinations and arrangements of parts, which will more fully appear in the course of the following description. However, the drawings merely show and the following description merely describes one embodiment of the present invention, which is given by way of illustration or example only.

In the drawings, like reference characters designate similar parts in the several views.

Fig. 1 is a top plan view of a transmissionhandling jack according to the present invention.

Fig. 2 is a longitudinal sectional view, as taken on line 2-2 of Fig. 1.

1 claim. (o1. 214-1) 2 Fig. 3 is an end View, as seen irl the direction of arrow 3 of Fig. 2.

The transmission-handling jack that is illusl Atrated comprises, generally, a base 5, an arm '6 movable in a vertical plane With respect to said base, a jack unit 'I for effecting said movement,

a cradle 8 carried. on thelend of'saidV armffand means 9 for adjusting 'said 'cradle relative yto .the arm.

The base 5 is a sturdy fabricated structure that comprises angularlyv d iverging elongatedl and horizontal members I0' that are joined by a plate II at their converging ends, and an erect frame I2 at said converging ends. Said frame comprises a pair of spaced channel members I3L connected 'at the top by "a plate I4. The base 5 is caster-wheel-mounted for movability, three wheels I5 being provided, one beneath plate Il and the other ytwo being secured to inwardly extending pads I6 on the diverged end of members I0. It is evident that the frame' is readily movable in allvdirections on its wheels and,"to facilitate pulling the same from beneath an 'automobile chassis, plate I4, at its edge directed to'- Wardthejdiverging endsof members" I0,iis upwardly turned to forma convenient' hand-,hold l1.

Arm 6 comprisesv a pairfof horizontally-spaced bars I8`that are connected 'at one end by a spacer tube I9a and, adjacent said tube, by a sturdy bridge member I9 to the bottom of which is aixed a cup member 20. A horizontal pivot rod 2I extends through the tube I9 between channel members I3 immediately beneath plate I4. Blocks 22 in said channels mount the pivot rod.

Bars I8, beyond bridging member I9, are slightly diverged and then extend parallel to each other to the end of the arm, terminating short of the end of the diverging base members The arm 6 is adapted to move on its pivot rod 2| in a vertical plane so that its free end can be adjusted from a position between a space 23 between members I0 to any position thereabove and even to a level above that of pivot rod 2|. The arm can thus be adjusted through an angular range approximating The cradle 8 comprises a transversely curved plate 24 that spans across and above bars I8 of arm 6, a pair of depending lugs 25 that extend between said bars, a spacer tube 26 for said lugs, and a horizontal pivot rod 2l extending through said tube and also serving to connect the bar ends. One side of the cradle is provided with ears 28 for eye-bolts 29 and the other with elongated projections 30. Chains 3l are connected to the eye-bolts and are adapted to be trained around a transmission or like device on the cradle and hooked onto projections 30 to firmly hold such a device rmly on the cradle.

The jack unit l is generally conventional, A,comprisinga cylinder 32, a ram 33, a jack handle 34 for extending the ram, and a release valve 35 for releasing the ram. In the present case, the jack unit is mounted on a horizontal pivot bar 3B on base 5 and ram33=is provided .with a spherical end 31 engaged in the socket of cup member 20. Thus as the ram extends or cone tracts, the jack unit automatically 4adjusts itself I on pivot bar 32. The angular change intheV disposition of the jack unit is relatively small during raising and lowering lorar-ni E.

The means 9 comprises a crank handle 38 on the end of a, threaded shank 39 that extends .through a bar 40 pivotally carried between arm vbars I3, and is held against endwise movement by nuts 4| in a pivoted bar Y42 extending between maintained except when crank handle 38 is operated.

The above-described device, with the arm 6 lowered, is readily moved to a position to bring fthe cradle beneath a transmission.

The jack 'unitf'l is then operated to elevate arm 8 toward -the transmission. Then, from a position between members I0, a mechanic can adjust the cradle vto the transmission by means 9. Chains 3| are then applied and the holding bolts for the transmission are removed. The arm 6 is then lowered to lower the transmission to clear the chassis and, if desired, the cradle can be adjusted to lbalance the transmission thereon. Finally, the jack is rolled on its wheels from beneath the chassis. ,Replacement of the transmission is as easily effected. It will be noted that at no timel ldoes the mechanic support any or the Weight of the transmission, the same being borne entirely 'by 'the present eiiicient device.

While the invention that vhas been illustrated and described is now regarded as the preferred latter bar.

4 embodiment, the construction is, of course, subject to modications without departing from the spirit and scope of the invention. It is, therefore. not desired to restrict the invention to the particular form of construction illustrated and described, but to cover all modifications that may fall Withinthe scope of the appended claim.

Having` thus described `my invention, what I claim and desire to secure by Letters Patent is: A jack of the character described, comprising a wheel-borne base having a pair of diverging horivzontal members and an erect frame at the end where said members meet, an arm on a horizontalfpivot carried -by said frame, a jack unit for `moving the free end of said arm in a vertical plane between-a, `lziositionbetvveen said diverging members and a position above the pivot thereof, a horizontal rpivot on the free end of said arm, a cradle carried by said pivot, and separate adjusting means for adjusting said cradle on its pivotin theplane of movement of the arm, said latter means comprising a crank having va threaded. shank, a pivotal bar on and arranged transversely of the arm and .through which said shank passes, a, second pivotal bar extending transversely of and carried by the cradle, and abutments on said shank on each side ofthe VINTON L. HAMLIN.

' References Cited in the file of this patent UNITED STATES PATENTS 

